What impresses me the most about chip music from back in the day is that they, just like the graphics of the era, left how the music should sound up to the imagination of the listener, I get a really strong brassy marching band vibe (or, perhaps more fittingly, 30's-50's/indiana jones style adventure movies) from the music in this, and that's pretty damn amazing considering they didn't even have access to the kind of filters or pitch/amplitude envelopes that some later chips had, letting the composer actually try to primitively emulate the sound of these instruments, in this case the composition alone has to do all the work to evoke that feeling.
And that's probably the saddest thing about modern chiptune music - back in the day composers tried to do something amazing within very strict constraints, whereas modern chiptune musicians do some pretty shallow imitations of the music of this era, and only "constraining" themselves in ways they want to, rather than having to conform to actual hardware limitations.
